METHOD FOR CONTROLLING THICKNESS OF STRIP AT COLD ROLLING MILL

摘要

PURPOSE: A control method of a thickness is provided to reduce a length of an off gauge by predicting an exact rolling set-up. CONSTITUTION: Thickness, widths and kind data of front/rear coils are compared. A connected portion of the coils is discriminated as a general welding portion when the coils are the same size and the same kind. In differing the size and the kind, the coils are distributed to gauge change points of three types. The coils are discriminated as a first type when the thickness difference of the coils is under 1.5% of the front coil, the width difference is under 30mm and the coils are the same kind. The coils are discriminated as a second type when the thickness difference is under 3.0%, the width difference is under 60mm and the coils are the same kind. The coils are discriminated as a third type when the thickness difference is over 3.0%, the width difference is over 60mm and the coils are the different kinds.